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From CompactFlash Association [1]:
COMPACTFLASH is a very small removable mass storage device. First
introduced in 1994 by SanDisk [2] Corporation, CF cards weigh a half
ounce and are the size of a matchbook. They provide complete
PCMCIA-ATA functionality and compatibility plus TrueIDE [3]
functionality compatible with ATA/ATAPI-4. At 43mm (1.7") x 36mm
(1.4") x 3.3mm (0.13"), the device's thickness is less than one-half
of a current PCMCIA [4] Type II card. It is actually one-fourth the
volume of a PCMCIA card. Compared to a 68-pin PCMCIA [5] card, a CF
card has 50 pins but still conforms to PCMCIA [6] ATA specs. It can be
easily slipped into a passive 68-pin Type II adapter card that fully
meets PCMCIA electrical and mechanical interface specifications.
CF CARDS are also available for data storage using the Microdrive. CF
I/O cards are available as modems, Ethernet, serial, digital phone
cards, laser scanners, BlueTooth [7] wireless, etc.
CF first turned up as a storage medium in digital cameras and the
like. Portable devices such as the iPaq use CF I/O cards for
applications such as wireless networking.
Links:
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[1] http://compactflash.org
[2] http://www.sandisk.com/
[3] http://melbournewireless.org.au/?TrueIDE
[4] http://melbournewireless.org.au/?PCMCIA
[5] http://melbournewireless.org.au/?PCMCIA
[6] http://melbournewireless.org.au/?PCMCIA
[7] http://melbournewireless.org.au/?BlueTooth
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